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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21f40b3a350a0743d152a4e9462df9b5fe741ddc6ae7a8c994810a3a2f4763f1' 
  AND token = 'WUxRRD2eDT7ZSi780iLGjICiXdt6fvPxz5yzBreFdxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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