Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cb231c4978162f1b39d0e037893032159c16035c2239da27de264e3763e1afd' 
  AND token = 'WzSF1b6c1lt1YKz+fNMbXD/8h0q7pgT/ciWLsBWdmcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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