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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'df0bb3b82b5e1f267bc037c398b422ac766be7e60d1bc4d96422835d85dea13e' 
  AND token = 'xiGsz0kgvJixVb/3o+eJ4XrGN3a/D00zvexmhK7bTnY=' 
  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"
    }
  }
}