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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0154677d3c4c9a7af2b69ca5a7cf74bc8203ad46384e4395974277508f176ff2' 
  AND token = 'n09I4GukijVbRSaF+x2U7w07diihRs6w1qKJ9U8aPJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}