Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b73d412532bc3dfeef6f88499f5db92fce0772f0d6ae0adbdcb8ff0255fddeaf' 
  AND token = 'R2m7UXA0c6xnV3YIspQ3REEOK06JBxY4Nf9POhKjYf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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