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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'eceec8ad935466aace8e69df9baf31af6b908d692facc543ae6e1e4e16013e1c' 
  AND token = 'EzSeIowkYfHts+9u6liL0A5BveZ6z8ae/tI2R9NalU4=' 
  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"
    }
  }
}