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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c847fe633adb7b6f81fb2d6cd6055562a59279f9e2c82f52d97bef8397268cf4' 
  AND token = 'n46Ln0VIf4EVVcEuNpLx5RucGjLvf4Mj4Elj5LDfSjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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