Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '683dc6b8530b4b1ba8bc200570d10a28eff3e74abf5760f156d400f89b2f422f' 
  AND token = '60uQ18ipB+wKmAaB2QvNyesPT619Zw9sDD7oU/Qw1M8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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