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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7207ae609b685f0ad4b9de9b7819daae21904baa3b408686fc62aeb37625c9df' 
  AND token = 'GFddqlDIBcHW4blMo1GtvtCBei0cD8SNj93G5soJhkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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