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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ed7a646533afd88ee783cf261eeb9babc6abb11b9cb6da686c4825b1ec65791' 
  AND token = 'X3qArWCfkXGSuxT2SGaYyfajJpU/Ms1AVxbfG1Al3/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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