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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '009be37d558b1090b2c7bf00f9b126ba97630252be190283e857ea89c0d6e048' 
  AND token = 'SAtRXRqikW9ByD26HXoGIZ+vcx4yzXVKZ5OSbrSMm5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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