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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ac006c3689f7fe556147f6bb47f225cb3c8d22104939789e1780a298c0b707f' 
  AND token = 'Lkou+M5VN/IvXkuCyAHthyyZ43jFwL84Mpd6524xq/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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