Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e53de5c2531a2716d385f8ca7efe57f6515bbc19855e8b46ea470fa87073fd61' 
  AND token = 'JrV4gPfzE6s/Bb+YF2HWv471T71nQ+GejaA9vl+joNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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