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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3d7ed26b30fe47457b1c77d28acebaace4ee7e75cabbd4b2b1613b998b100b37' 
  AND token = 'OgxqpKh6BUoQZWdSB/tT88H/lVHK73tcvYHdBwFf0DE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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