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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a3e2e41c799caa34c6898ce881e6c832fd13ed5f69a669d517257600056929f' 
  AND token = 'Z+Yyg8fLiYIzlVRToYLW9n0230e5qPvWBl0bVJ/2nuc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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