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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccbc20acc2ffabc51af0fea85ad43f5f64967178971a676a063ba0bd0c30e2c3' 
  AND token = 'KfFsHsH6B3ydzgFlpuPEivQ5ChAvPjWW3ERP8S/vGFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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