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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed048f3ecd3283bea3f74ba29c5e4fb342ca02db5cea7741d34a9f69e7cb6809' 
  AND token = '1ojp4Zv7uD9CNVX8CZaK9Ehl8R6FW/bHL5YmewJE3s8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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