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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd16ceabe30b5a89c32ae9c604240f3f7b9c4fa5a661e74e7dca5d96ab930bfaf' 
  AND token = 'ED94Nt+vCb+zUDnOi+RHtIRWqAE4SVebNrBMpIriN6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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