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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f58153e9e7f61d3bd27c9fe286448fb01702494890c2fd0af047da08db5ecead' 
  AND token = 'ixlhiXDhwcUhKrXxqUHysJ4wp8fjbPxASwipDT7aTp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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