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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d3904c4e1ecf0429e30c7f516a49f141902bb603f3729d2c7f343821aa5de67' 
  AND token = 'hVUZTgVBnJpUA7vrzQyuJm26d7maiJybrkeSbO/H6cs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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