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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24341950d7b76200a7aa1ce331ff9c6ac6d74831fb2009df70d68bfc7551e59d' 
  AND token = '1v8plYyMomRRVW0Ccm4vc90JqYOKgrQF19sllfR9/eU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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