Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '639cd513b570f14c9837afc056efe262eeec23b1d636e095885c2e7e957b8d7d' 
  AND token = '1Eu5Gh4j3R0Bz3QTIpqI6k7bBrVNEP9GlL82TQPlS7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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