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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2f474f684bf8be85d900683b6dbb8bf66e42c9db92b50fa2f208b7e3220f72ac' 
  AND token = '9y9asaW8Y90r69Ldbz2T8Fhelnjc7D88fkyxi3qoj1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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