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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05e99cd8c8ca213225465a1c4e50b9e839c7af406809695a9ce794b309e77e9c' 
  AND token = 'tf1PZXH1xMAcKmbTBl9wa0UfVBeJMoWy9Z0cHFYY6uw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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