SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b5b84cb6d519376fcd1c75a79a5130f42483bc26ac0683859db953bf4d4ebcc' 
  AND token = 'VQzCWenTCUeKjbqTqENgWRlSaAxZ3hkSZgO/7bKDVeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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