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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '070261606572b7da6434c864f9955359cfe45c74811669636b035d58757b6546' 
  AND token = 'ZIY8s+9T1ORthoosXyJdIkcRzM8s3hN0cLJBb+mSwKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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