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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1eb941f1fbcf001ce6d99bc03579044019e226c3b4702b255256ccc2e409fce5' 
  AND token = 'jaw0od0d+40Xe6RnvXa+C/ZJwwa8PIFryo4Ysi9c5kg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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