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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02e9f710bc1542c5bb2e28d5167e9f7e539fbcd125ab83990837f157736a4b47' 
  AND token = '41DtEFff/f2J5+7xFpG+elit6yKrabkHaX7jbLOAKgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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