Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cec06b17a545ed7f0d00e47d558d36de406eda41f33a2378fa2fd7495a24876' 
  AND token = 'r6dNQ6wJsxKBLT9+2oEAqtIbxbaL0jen48cylIHUH18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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