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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4019299899468afd98a9f3a53c499a3b3e402b1df78a84191efdce8987e18453' 
  AND token = 'NyccoyyUuDpKKh4mQWBSgBxosuK2z3cawE+o3bVTcvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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