Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed70f23b7aa2f39971c5d934b0bfdbc0275bcd94d03960071fca10bf0401d062' 
  AND token = 'fgK3zF8NHImmjmk3Jvbc0HMNYnNJ+d9X7QCiIhe5YZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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