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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd133b532f0ab7a49131dbc10e8034692d29cfcdd5a7a0ac998ac1aa6c8b200b' 
  AND token = 'CgUi3YDx4CSX9R8UF0nJ4OgTBKtga2WgRmzN/hhtWV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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