Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eebf50db539cd1864a26f3482b0e793d74c9fc778968b5622ac07d122eb113d2' 
  AND token = 'qHlYX3G32DV5ZTMm8OAYAi5wLeXR+rib8KDqPu6x0Go=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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