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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6928ecb34000da472ae52ce10fbeff267fc5ad7caec6f07cb7e91af5630f5131' 
  AND token = 'lNH7y2jFZ+2iACcKnrYOcioHZaK4oHyuLhM1JH1CLw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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