Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f1251e928eaccd6a66cd3ed65e7d54fbb9901d15fd0f559481aa322a9a25544' 
  AND token = 's0CjN3z/Ut28eAa5X11ee79gprsr+esuRLj0FhqcS/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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