Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8767a5243678eadb76bf71382d161b8ec9b930e5fab4a29a718732dd79d68f73' 
  AND token = 'XMZbgRLcEYY+C5fpk0IyaEmbB2iLR8AeVhXyfxeAdw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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