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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22a19eeba4325796de2cbedf691625ad071c5ba33d1819f2aa34c9e3d523bd0e' 
  AND token = 'Pbagh9TxHhCcx3Xo0pAbzA/dglodqSITRg1l73qgFzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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