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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05443b5ff7cbe168176ae1dbc6c32bf55a951c46f7ed132541f1171bb0f51809' 
  AND token = 'cfyWqu2eHia9w0HmqbTsx+FX55XjABr+JPeTUmXqCdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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