Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '29a91e3c39d5fb61606184bcb6cf3c8093d3805a3a07a0dd7c682b8eaa454ef5' 
  AND token = 'Lx+p4L9cxVko7NyLg4duHAhui67DAM1bPGtxl7sxN54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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