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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '93adfd65246fe13cf5cfbe7e6c6ac3db492ccafff90530200509ea6bf8fa46a8' 
  AND token = 'JYlIZTlhPWtoLxl6cmha3TCuaQh8CMyJm7Bt3pGVC6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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