Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bcf4cf73e0d81a668f7f18d3d853153dc35cb5b4084536a3febecb2d1291a31' 
  AND token = '25VVUA1v75B8HLl7tnicBSh5+j9SPCLeSbtF+tCUI60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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