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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b41f1fbfd430269ba8b842fb82c299d23a832bd5b1c860a6ec5541df7b398a6' 
  AND token = 'ryMX927TbTh3eMx/nLh0keEOKc/04JLwT90RLEEV000=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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