Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9aac1e01d9ef15db26437956a91d13431b4cdb7ecae8ffef4c3689a183d60090' 
  AND token = 'TlYqsKxGM//NCREtlC8n9YWTviOJ2mmnTIC/IS99YbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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