Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e2799bdfdbbf347c1576e0c99c0a4c62da523c833773f9732f5dc35b392a439' 
  AND token = 'o2lVahpsbEvxCr8TfA8+2ctWwoILjOX8NL/CiqxRsEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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