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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1185e6159aa7cff63801d9ecb721e14743a2892246c6a9a28a668fbb543e724e' 
  AND token = 'KQUKFNfpbd2NVy9hoQSU7Xq8c2PmKeFJz/BW0NWM7ok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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