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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0130b09a926c555eec67c539e59db0d37c80d42b6a955318ab1442d5dbe96920' 
  AND token = 'xGd35x1HRvQmbOmpO/P+roU31GIWtvcI5xIZmFALvx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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