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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c82f8672366e5ce6edfcd88129c1df0a89e572d8d557091d304af05a58e5cc6b' 
  AND token = 'PVf4e3glPO7yT7cr4sPsVgtF+fgGCDntTI/V3RkFCdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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