Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a29d1c885ea4c32020444b74a9d3e84bd28201aa7c9ab2abc054dd37b175d41' 
  AND token = 'gvA1Lw5zZtM5JWYuU31gCg6cHCSdxYNFP7pTzGkKC4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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