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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac6f8d00876c5d44ac012211311f228edd1952bbb066057a0b366edfd169d200' 
  AND token = 'Tlf0Af3fM9bewV33K7R2cRUukmwPG7Wnb57ixnudU2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}