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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f25b2ffb59bca8c27046cdcbf7972f8bd26f2e52e30e337ec0fbb4433214f2bb' 
  AND token = 'tssqTM7X19Ph57PbJd5INmCT9q2+7nACu335OEkvPpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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