Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbadcbb1698ae8018a058aa4f0e9876bbd6d9659c33b883e1ff82f2638c299d1' 
  AND token = 'VNdjXnm5onQLOW1pV8MSoemR6GAG1yPqs41dOGB55KY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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