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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9dee88c5c83d7c2b63e6ba4be3983af544f4efb72f8a0df5a4ba447161638b74' 
  AND token = 'ha/Dern/WrgiOXpogIIJbn2jWectjTPd2aFX9oATZ64=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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