SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe1f6a5ad634a5a07b95a55f75a31069f894fade4e908380939900d5e88272de' 
  AND token = 'F5Q2KwGKV9+CYuNUzAWLhk7A1hqUbSOKqijvVsapzq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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