Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fcfa2db31a08557613eceaddb4dbaa3412258dac5aacd2c0c1952e715c19139' 
  AND token = '71WMNJV4gJn42ZxWirUFLI6floYcKjt0Qzuv1mt0cyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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