Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3dafaad5ac753b5221c3465a9f6a506a86582b327626b2bc6103441f28bd527' 
  AND token = 'hKkbCdaSnQytHZgVr8gWKfB6FiKsfzm7zyfQnqpvFoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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