Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31381fa6e0cec09138d16f175272614ae7a99153de8657b9022a02b1d98eccc5' 
  AND token = '5jOeDP73kW9AuwM/elr+j2OUujIsfrNXhJQ9l2Eu5P4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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