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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '976780695d933142e0ea48d4cf09c1ef6d6e49f16ac2387eb08f4c56e0f11ec0' 
  AND token = 'w2S3oK/uGtzLPGneLhdqD0LMCY/p0DCfrOTiT5Exdc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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