Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7c3747888f72ac628e0324c2497e9d3de4caba27c48d7baf8ef3447af4505a5' 
  AND token = 'P4XS9dYCyZEYPyfAPi58RtDNyFLWPu4vkHIDXDgI010=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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