Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad7b56ce814292c5c87ef90241a6e9cdd07d05d27e7602ec4914a88f868e61a0' 
  AND token = 'CUoVIUUP+gg4PsinMxix6ceAY/GC5hTxEYBz1rP8Too=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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