SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80ee44001bad4952e358c1d5115635f463863520b7f04fa641ee8c4ae6e10b36' 
  AND token = 'Hhee2PhvZbGpCkvYvU/U94gcRViIi9H+uz/DGXLBNes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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