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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7035eed5e07f38907630f2c3c43702a9e7c7393e75e265c3fe5666f6549705ba' 
  AND token = 'X3jtoAqo2ih9Q9dpl5QJuIQ39vXTL1EEyxU4nxjLa0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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