Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99ea9da49e61ed7d1c0a18d78da44b696d36bfb50da5e5b70ec1f4519c5f357c' 
  AND token = 'BwcKmwldDWWg3EqPeFXWBJQS0rjwkO63o1PC1ly0xqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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