Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3a77a67e5ce0417a79328c6fa1aec8e5704cdb668ce564277f03663120ab589' 
  AND token = '34swcYHzg5MdcjOmbHNM1Bx36q3IcmYiC5yZXxbZBb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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