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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b41a7e61ad545bee960b1cfdba28068ca737439d46811f9eb4eb0bc58145e5dc' 
  AND token = 'u+s9FfxsfMcu329gzjKWoY/f1+6MW5L12+i4s5HFxAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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