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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17633eca9a9e6a95de520031dc02997720365f138057b263e0faf104b32fa1c2' 
  AND token = 'WZvZDXDc79R3xYGSX/XBI23xjOoWuO802cyW24Y3Lb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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