SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63dd7df7414ea7dfdaf486053bd4d0d340ab8d089e2921c4a48549b572f4ed12' 
  AND token = 'qlFmseWEh7GksqzVz/KGxMGDolUf/SZIfnnulsc5JLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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