Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8f87dcddf3cd90a17d46ed3ade40ecdbe09ff550f569c5b7ac9f205970e86e67' 
  AND token = 'rkfAF3VjNasfdu51Ytsw4kzPecLIxNmnZv54RPCPQYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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