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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a72c3b9dc1d0331bb4f68178ad792f66c86b711bfeb22ccf7d97c99eb331ffec' 
  AND token = 'QqFE9dswqX8ziZ4qAzhiZUI+S5Lk5os/zgstiXu6o0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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