Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80c3a0662b2690ec49384382a6debca90feb2112e5f65a470592e8ea88a8b085' 
  AND token = 'Cffp+pQq56b2RW0jwNqTiwwNr+v64A7/XdWP0DlnfxM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}