Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80f338d651d46f203cb10aa807aa50e8a93e9a058fa3c34992ae467d8c286d5b' 
  AND token = 'rWUUd6hfv7z+LWV6KFfdXAhgmfDpX2NOuxwI0epzW1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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