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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ee95aa9eda315eb3922404265282cb7c97cfc965e5e45a087d9f2b985d5396e' 
  AND token = 'QrhKaZVIYxY7hz/wal/g7tTQ7sEDt6sJZVmJ4kaw1f8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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