Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7994872c1fb05f2332e11a191eb2571f827b8b975a6b2f14884250a77a795f2' 
  AND token = '/t1V0+6tYkNcKvjXF5NpN7Nn2VrCpubFV+QIlqEy0rw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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