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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61d080c5b962d612b6fa8e6262361d4c8674cbb0f505ba766eed1d054e199f62' 
  AND token = 'PasFwp4xu+EQuK/yuL/AmbMHdoIRiO5uFsMGpu0UwSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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