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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73dac3d6a772e51636ad900efb4233bbc67eee3185dd2e73f1947388132fe06c' 
  AND token = 'ZAENBU2GFaZe5L/3iHVJXDWdNQ7G02RbBeCV2Ivdseo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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