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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bee8ab57b21dc3f5f6b0917384e1549ac86585f218862f81523344ac6e10bae' 
  AND token = 'Nsjv1WuZhzX92e/RL+G3tDNUhXoAzDxdR63t7Yl3+No=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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