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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07ffbcf368b5e96fbb2dc0ecdeb2b36f010d3582279d977766d217cff32dbde5' 
  AND token = 'Q5GDJtyQxY4NdHidaLhUpQBUkqZh/TcJYw1qW50WtLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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