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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69a72d440c765a0bcb0d8e89243b85bedd69669189bea2460eda3ae56f5c401e' 
  AND token = 'g1J0osGrEf1IYU+f5Mztw1bmMhdNB3e4boS1E9Sof/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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