Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1715ab1f58368139cc980292eee2cabec12cedcdde31dddf06d78fa389c50c73' 
  AND token = 'MW72gVr9mz6+db/DGmYJhHMJ617rgHGCJm+NYXIp1EE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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