Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb37f2383ed5480e44a08d16e2e190293625c4ad090ddfda3041505f88556c53' 
  AND token = '/MzmBiJVw3/fB0CucabdUV3qkdyhvHlQmPjDQ4j/qUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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