Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f267d5d3bed250eef0c74f097c01157d45744f0fd7f55e7596eff1b401452a91' 
  AND token = 'XmMUazU0su+CyzNeoyadFHu14ANxcxkwWKVWPNQRaWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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