Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0457d29014007e12df71226277b22f9c5b528cb55351d87a104038a663370a00' 
  AND token = 'ltJ+Bzlp72G2TsCFvYEJWMWGcCfu6zyYN0V+diyrrkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}