Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '15e83f1144877ed07bdb2ea343fb79f47485aef2b15f20c827ff6bda1c3a0880' 
  AND token = 'Euq455L9PcTMJFbGnyynqRyL+Kj8Ho5Q8ga3+m5UU1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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