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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1af7d4f1c0947d32e5581caf519eb11f23d29aa65cf08cdf32ae2a8f06ab7a49' 
  AND token = '0yLZxTDcJCYXHnQr+neF4f6L+9nmyTc3xTDSwjsx5jk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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