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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03a95a55a8833e8f77bb4287ab8dd10fe72e75f22a276533862ba35db477b631' 
  AND token = 'H18k4CPJ9DVd2IL/xKmPWsPoMPgIF4LP6bm8nwKP7QE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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